- 天台山 Tiāntāi Shān Mount TiantaiMount Tiantai near Shaoxing in Zhejiang, the center of Tiantai Buddhism
- 天台县 Tiāntāixiàn Tiantai CountyTiantai county in Taizhou, Zhejiang
- 司天台 sītiāntái Bureau of AstronomyImperial observatory or bureau of astronomy (official title) from the Tang dynasty onwards
- 天台宗 Tiāntáizōng Tiantai schoolthe Tiantai school of Buddhism
- 浙江天台县 Zhèjiāng Tiāntáixiàn Tiantai CountyTiantai County in Zhejiang